CMMVC9375E The command failed because the volume is already mapped to another host. Use -force to create the mapping.
Explanation
This error can occur when an attempt is made to create a mapping between a volume and a host, when the volume is already mapped to another host. If a volume is mapped to multiple hosts, the hosts must coordinate access to avoid corrupting data.
User response
To map the volume to multiple hosts, create the mapping by retrying the command and specifying the -force flag. Otherwise, remove the existing host mapping to the volume and then retry the command.